body {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: xx-small;
margin:0;
padding:0;


}
#un {
background-color:#00CCCC;
padding:15px;
margin:0px;
}
#deux {
background-color:#CCCC99;
padding:15px;
margin:0px;
width:200px;
float:left;}
#trois {
background-color:#FFCCCC;
padding:15px;
margin:0px;
width:200px;
float:right;}
#quatre {
background-color:#FF99CC;
padding:15px;
margin:0px 200px 0px 200px;
}
#cinq {
background-color:#009966;
padding:15px;
margin:0px;
clear:both;
} 